IB/ipath: Make send buffers available for kernel if not allocated to user
A fixed partitioning of send buffers is determined at driver load time
for user processes and kernel use. Since send buffers are a scarce
resource, it makes sense to allow the kernel to use the buffers if they
are not in use by a user process.
Also, eliminate code duplication for ipath_force_pio_avail_update().
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_intr.c b/drivers/infiniband/hw/ipath/ipath_intr.c
index 5608e32..d1e13a4 100644
--- a/drivers/infiniband/hw/ipath/ipath_intr.c
+++ b/drivers/infiniband/hw/ipath/ipath_intr.c
@@ -804,7 +804,6 @@
{
int i, im;
u64 val;
- unsigned long flags;
/* disable error interrupts, to avoid confusion */
ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, 0ULL);
@@ -823,14 +822,7 @@
dd->ipath_control);
/* ensure pio avail updates continue */
- spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags);
- ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
- dd->ipath_sendctrl & ~INFINIPATH_S_PIOBUFAVAILUPD);
- ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
- ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
- dd->ipath_sendctrl);
- ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
- spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags);
+ ipath_force_pio_avail_update(dd);
/*
* We just enabled pioavailupdate, so dma copy is almost certainly
@@ -842,7 +834,9 @@
i ^ 1 : i;
val = ipath_read_kreg64(dd, (0x1000 / sizeof(u64)) + im);
dd->ipath_pioavailregs_dma[i] = cpu_to_le64(val);
- dd->ipath_pioavailshadow[i] = val;
+ dd->ipath_pioavailshadow[i] = val |
+ (~dd->ipath_pioavailkernel[i] <<
+ INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT);
}
/*